C language simulation to realize Strcat function

analyze

Strcat String concatenation function
Implement char * my_strcat(char * str1, const char * str2) function
to return the address of str1 string.
Append the string pointed to by str2 to the string pointed to by str1. The

code is as follows

#include<stdio.h>
#include<stdlib.h>
#include<assert.h>
char * my_strcat( char* str1,const char* str2)
{
    char *ret = str1;
    assert(str1!=NULL);
    assert(str2!=NULL);
    while(*str1!='\0')//让指针指向str1的最后面
    {
        str1++;
    }
    while(*str1++ = *str2++)
    {
        ;
    }
    return ret;

}

test section

int main()
{
    char arr1[10]="hello ";
    char arr2[]="word";
    my_strcat(arr1,arr2);
    printf("%s",arr1);
    system("pause");
    return 0;

}

operation result